I have seen the posts flickering. I have a post processing that works fine, based on the tutorial at UE5 l Basic Usage of Custom Depth & Stencil l Shader Tutorial l Unreal Engine 5.
The problem is that there is flickering when behind objects. I have “Custom Depth with TemporalAA Jitter” enabled. When I set it to disabled, the flickering goes away for the when behind, but the non-hidden is flashing between the base material and post-process material. Below is the material. The wire above is to the color selection, but have no bearing on the flickering.